Incandescent-lamp socket.



B. H. IRISH.

INCANDBSGBNT LAMP SOCKET.

APPLIOATION FILED Nov. a, 1910.

1,65%@ 9, f Patented 13611.25, 1913.

1 desirable, since .'t

.E'UR HILL IlliISl-I, 01" PERU, INDIANA, .ASSIGNOR TO PERU ELECTRIC COMPANY.

PERU, INDIANA., A CORPORATION OF INDIANA.

INCANDESCEN :tog-pietra 7h all whom alf m/n/ of 71, com

Re it known ythat. l, liurr ll. linnn. a citizen et the United Statesr` residingA at Peru, in the county ol irliami and State oi" ludienia, have invented certain new and useful .linprovcn'ientfs 'in l11caudeaccntwlauup Sockets, ot Whichthe following` is a specitication, reference being had to the accompanying drawings, 'forming a` part. thereof.

The purpose of this invention is to pro-- vvide. a yielding` center contact vt'or electric lamp socket.. and .like devices.

In the drawings--l `iguro l is an axial section oi a socket, provided with a center Contact embodying this invention, and sl1owing" a lamp base entered therein to the point of initial continrt. Fig. Q an elevation otl a socket, certain parte being broken away to show a lamp screwed hemel to complete contact; position. Fig. 2:3 an intcrior plan View of the same. Fig'. -4- is a plan view of the hach side ot the Socket' to ahow electrical connections. Vie'. is a per1 spective view of the contact' element alone, for showing' ita annular nature.

The device which is the Subject ot this invention F intended :tor use in any type ot lamp Socket or holder, 'in which the lamp is secured by coperating;` devices in the Shell or liningot the socket and on the lamp hase respectively. The most usual form is that shown in the drawings. l1av ing a coarae-tl1readed metallic lining( l, designed to receive a correspondinggly thread-v ed hase 2 oil a lamp indicated at fl. rl'his metallic liningl et thev socket constitutes one pele of the electrical connection between thc Socket and thc lamp, the other pole twiner tnrniehetl hy some form oit aXial-lyanonnl' ed contact-pieces, Lil and fi, on the lamp and the hase oi' the socket, respectively.

lll/'hen the center contact is ol rigid or .noir-yielding form, any vibration of the socket. tends to looScn the lamp, causing rotation et the saine and separation el the ceuter contacts, reeulting in heating' and rapid deterioration ot' the parts. For this reason` the yielding;- or spring form ot contact is furnishes a constant pressare between threads la lamp base engages the socket, thereby tenrll 111g to prevent loosening oi the lamp due to vibration Sach spring contacta commonly vhave been so torniiei'fl and mounted that the area ot contact iras at the moet undesirable and 2, hy which the` Specification of Letters Patent.

Application tiled November 3. 1910,

T-LAMP SOCKET.

Patented Feb. HH 3.

Serial No1 590,447.

part ol' thtI lamp harter-thai is, ou thc ccnler if". when the lilium-nl' haul wirr is lsolilrrwh---aud either so that only a small arca ot' contact could he reliahlv ohtaimd. or ao that the art-a ot' contact was variable accordiugg to thi` exit-,ut to which thc yielding' clement was deprcsstal ln' the insertion of the lamp hase.

'lhc present device is formed otl a small disk .7, ot sheet-metal, which may he circular in shape, haring;r a central portion. o, cut away l'rom thc remainder on three sides. and otliset therefrom so as to lie in a plantl approxiniatel): parallel to it. The two parallel portions ot the disk then remain connected ln' a tongue ot metal 5". vtrom the tour-th or uncut side ogt' the smaller portion 5. This otl'set portion is apertured to receive :rs1-.row t'. hy which the entire dishr is clamped ino positiotn in the porcelain or other insula :ing hase il ol` the socket 7, said screw constith irre the electrical conncction between thc contact element 5 and thc binding clip tl ou thtI outside (ll t'lul linac. lfhis otl'sct portion ."i is ohlongr. :o that when entered in a correspondingly shaped recess, 7l. in the socket hase. it is prevented trom turning and loosening. as it might otherwise tend to do under the Ytrictional dran; caused in unset-@wing the lamp for removal. The outer and larger portion, 5C, ol the disk then stands in position for contact with the lamp hase 2, and boing annular in torni, it afroids contact. with the central portion ol the lamp hase, where the lilaincnt lead wires a rc solderet'l. and where a prtriectinfl lump of solder. shown al Q, might otherwise prevent good contact.

Referring to Fig. l, it will he understood that the device is initially .set in the socket with' its contacting portion 5"; slightly tilted with respect to the base of the lamp, `vthat is. not exactly at; right angles to the axis ot' the aocket. the direction of tilting' boing; such that the end fartheft removed from the connccting tongue 5b will be the first to contact with the lamp baseias it is screwed into the socket, this being the more resilient end oi the two. As the lamp is screwed farther into the socket, this end depressed, and complete contact between the lamp and contacting surface is obtained against the yielding pressure resulting from such depres- Slon.

extending 1 slightly under the pressure ot thc lmnp buse, j so that even nt'ter the conlzictingjl` portion is l brought to the position shown in Fig: 2, :in j additional securing pressure muy be obg tained by entering the lmnp base :t little t:ir

ther into the socket.

I claim w j l. A Contact element toi* an lncmitlceccnt E lamp socket comprising e metallic contact clislt having` its central portion offset 'trom the Contact portion in e. plane epproxmmtely parallel thereto, and e connection between the Contact portion and the oit'set portion, the latter being adapted for securing the Contact element to the base of the socket, anti the Connection having itsl junction with the contact portion within the aren ot' contact of the same.

'2. .in combination with a lump socket. n

Contact element comprising :L metallic eontact'member, a. fastening member offset. from the plane ol the Contact member and :ipproximately pin-alici thereto, and zt connection between them, the fastening member being adopted for-.seeming the contact element to the socket bose,lthe socket having n. recess at. the center of its buse formed to receive said fastening member and to prevent rotation 'of the same, and the connection bebuse, e second Contact element comprising n Y contact disk member, a, fastening member adapted for sccining the conta-ct element to the socket base,- nnd a connecting member between the two'lcading from e part of the contnct member.within its area ot contatti,-

thc contact disk being initially set in :t plane nearly perpeinliculnr to the exis of the socket, but :ulnptetl to rock yieltlingly about. its line of connection Awith the connecting member under j'ncssnre of the lamp brise.

ft. in coinliination-with an incnnrleseent lmnp socket lmring n metallic lining which constitutes one electrical Contact with a lmnp base, a second contact element comprising n centrally apertnred tlislc member, :t Vtesten ing member adapted 'for ,securing the contact clement to the socket baise, :mtl :1 connecting element between the two lending from a port of the Contact member within its siren of contact, the contactflisl( being initially set `in n nl'nne nearly pcrj'iendicnlur to the exis ot thc socket, but zulnptetl to rock ),fielclingly about its line of connection with the connectingr member under pressure ol the lmnp base.

in testimony whereof,l I have hereunto set my hund, in the presence of two witnesses, this Q9 clay ot' October, 11910.

-BURT HILL IRSH.

lVitnesses:

AnoLPH Josemi', Cit-ins. Gr. BURTON.

"Witt Mime/it@ 

